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United States

Mercer County Jail

Low
Verified 28 May 2026
Fresh · 2d ago

Data is aggregated from public sources and may be incomplete or out of date. Always verify with primary sources before acting on any figure. See data sources.

For families

How to send mail, money, and visit Mercer County Jail

Step-by-step guidance using the United States system — addresses, money services, visit booking, what to bring on your first visit.

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Photograph of Mercer County Jail

Background

The Mercer County Jail is a historic county jail building located at 309 South College Avenue in Aledo, Mercer County, Illinois. Completed in 1909, the building was the county's third jail and its second in Aledo. Architect Clair F. Drury of Moline designed the Tudor Revival building. The two-story brick building features terra cotta ornamentation, including quoin-like window surrounds. The building's cross gabled roof has a large gable above the main entrance; both its gables and its dormers are parapeted.

Source: Wikipedia article lead, CC-BY-SA.

Capacity

Current population

Occupancy

Year opened

Operational

Facility profile

Operator

Population held

Mixed/unknown

Opened

Region

Security level

Death-row facility

No

Conditions

No conditions summary available yet.

Visiting

No visiting information available.

Mailing

No mailing information available.

Practical info

Contact the operator's website for inmate-specific procedures.

Known issues

No major issues documented in our database.

Contact & address

309 South College Avenue

No public contact details available.

Conditions Risk Score

Derived signal — not a judgement. How it's calculated

Insufficient data
We don't have enough public data on this facility to score it. Have something to add? Send us a correction.

Data completeness

22%

How many of our profile fields are populated. We surface this so families and researchers know the limits.

Sources